Designates the computer or chip architecture to which the element appliesDesignates the intended audience to which the element applies, for example, system administrators, programmers, or new users.provides a standard place for application-specific effectivityIndicates standards conformance characteristics of the elementIndicates the operating system to which the element is applicableIndicates the editorial revision to which the element belongsIndicates something about the security level associated with the element to which it appliesIndicates the level of user experience for which the element appliesIndicates the computer vendor to which the element applies.Indicates the word size (width in bits) of the computer architecture to which the element appliesPoints to the element whose content is to be used as the text of the linkPoints to an internal link target by identifying the value of its xml:id attributePoints to one or more internal link targets by identifying the value of their xml:id attributesIdentifies a link target with a URIIdentifies the XLink link typesimpleAn XLink simple linkIdentifies the XLink role of the linkIdentifies the XLink arcrole of the linkIdentifies the XLink title of the linknewAn application traversing to the ending resource should load it in a new window, frame, pane, or other relevant presentation context.replaceAn application traversing to the ending resource should load the resource in the same window, frame, pane, or other relevant presentation context in which the starting resource was loaded.embedAn application traversing to the ending resource should load its presentation in place of the presentation of the starting resource.otherThe behavior of an application traversing to the ending resource is unconstrained by XLink. The application should look for other markup present in the link to determine the appropriate behavior.noneThe behavior of an application traversing to the ending resource is unconstrained by this specification. No other markup is present to help the application determine the appropriate behavior.Identifies the XLink show behavior of the linkonLoadAn application should traverse to the ending resource immediately on loading the starting resource.onRequestAn application should traverse from the starting resource to the ending resource only on a post-loading event triggered for the purpose of traversal.otherThe behavior of an application traversing to the ending resource is unconstrained by this specification. The application should look for other markup present in the link to determine the appropriate behavior.noneThe behavior of an application traversing to the ending resource is unconstrained by this specification. No other markup is present to help the application determine the appropriate behavior.Identifies the XLink actuate behavior of the linkIdentifies the unique ID value of the elementSpecifies the DocBook version of the element and its descendantsSpecifies the natural language of the element and its descendantsSpecifies the base URI of the element and its descendantsProvides the name or similar semantic identifier assigned to the content in some previous markup schemeProvides the text that is to be generated for a cross reference to the elementSpecifies a keyword or keywords identifying additional style informationchangedThe element has been changed.addedThe element is new (has been added to the document).deletedThe element has been deleted.offExplicitly turns off revision markup for this element.Identifies the revision status of the elementltrLeft-to-right textrtlRight-to-left textlroLeft-to-right overriderloRight-to-left overrideIdentifies the direction of text in an elementSpecifies the format of the dataIndentifies the location of the data by URIIdentifies the location of the data by external identifier (entity name)continuesLine numbering continues from the immediately preceding element with the same name.restartsLine numbering restarts (begins at 1, usually).Determines whether line numbering continues from the previous element or restarts.numberedLines are numbered.unnumberedLines are not numbered.Determines whether lines are numbered.Specifies the initial line number.Identifies the language (i.e. programming language) of the verbatim content.Can be used to indicate explicitly that whitespace in the verbatim environment is preserved. Whitespace must always be preserved in verbatim environments whether this attribute is specified or not.preserveWhitespace must be preserved.Specifies an identifying string for presentation purposesSpecifies the width (in characters) of the elementcompactThe spacing should be "compact".normalThe spacing should be "normal".Specifies (a hint about) the spacing of the content0The element should be rendered in the current text flow (with the flow column width).1The element should be rendered across the full text page.Indicates if the element is rendered across the column or the pageIdentifies the language (i.e. programming language) of the content.optionalThe content describes an optional step or steps.requiredThe content describes a required step or steps.Specifies if the content is required or optional.Specifies style information to be used when rendering the floatSpecifies the width of the elementSpecifies the depth of the elementSpecifies the width of the content rectangleSpecifies the depth of the content rectangle0False (do not scale-to-fit; anamorphic scaling may occur)1True (scale-to-fit; anamorphic scaling is forbidden)Specifies the scaling factorcenterCentered horizontallycharAligned horizontally on the specified characterjustifyFully justified (left and right margins or edges)leftLeft alignedrightRight alignedbottomAligned on the bottom of the regionmiddleCentered verticallytopAligned on the top of the regiondoiA document object identifier.isbnAn international standard book number.isrnAn international standard technical report number (ISO 10444).issnAn international standard serial number.libraryofcongressA Library of Congress reference number.pubsnumberA publication number (an internal number or possibly organizational standard).uriA Uniform Resource IdentifierIdentifies the kind of bibliographic identifierIdentifies the nature of the non-standard bibliographic identifierIdentifies the kind of bibliographic identifierotherIndicates that the identifier is some 'other' kind.

The text of the title of a section of a document or of a formal block-level element

The abbreviation of a title

The subtitle of a document

A wrapper for information about a component or other block

A wrapper for information about a component or other block with a required title

A wrapper for information about a component or other block with only a title

A wrapper for information about a component or other block with only a required title

A wrapper for information about a component or other block without a title

Identifies the controlled vocabulary used by this set's termsA set of terms describing the subject matter of a document

Specifies a ranking for this subject relative to other subjects in the same setOne of a group of terms describing the subject matter of a document

A term in a group of terms describing the subject matter of a document

A set of keywords describing the content of a document

One of a set of keywords describing the content of a document

A list of operations to be performed in a well-defined sequence

A unit of action in a procedure

Alternative steps in a procedure

A wrapper for steps that occur within steps in a procedure

A portion of a document that is isolated from the main narrative flowsidebar must not occur in the descendants of sidebar

A summary

A short description or note about a person

A quotation set off from the main text

The source of a block quote or epigraph

sect1Render as a first-level sectionsect2Render as a second-level sectionsect3Render as a third-level sectionsect4Render as a fourth-level sectionsect5Render as a fifth-level sectionIndicates how the bridge head should be renderedIdentifies the nature of the non-standard renderingIndicates how the bridge head should be renderedotherIdentifies a non-standard renderingA free-floating heading

A remark (or comment) intended for presentation in a draft manuscript

A short inscription at the beginning of a document or component

Identifies the desired footnote markA footnotefootnote must not occur in the descendants of footnoteexample must not occur in the descendants of footnotefigure must not occur in the descendants of footnotetable must not occur in the descendants of footnoteequation must not occur in the descendants of footnotecaution must not occur in the descendants of footnoteimportant must not occur in the descendants of footnotenote must not occur in the descendants of footnotetip must not occur in the descendants of footnotewarning must not occur in the descendants of footnoteindexterm must not occur in the descendants of footnotesidebar must not occur in the descendants of footnotetask must not occur in the descendants of footnoteepigraph must not occur in the descendants of footnote

A paragraph with a title

A paragraphThe root element must have a version attribute.

A paragraph that contains only text and inline markup, no block elements

A note of cautioncaution must not occur in the descendants of cautionimportant must not occur in the descendants of cautionnote must not occur in the descendants of cautiontip must not occur in the descendants of cautionwarning must not occur in the descendants of caution

An admonition set off from the textcaution must not occur in the descendants of importantimportant must not occur in the descendants of importantnote must not occur in the descendants of importanttip must not occur in the descendants of importantwarning must not occur in the descendants of important

A message set off from the textcaution must not occur in the descendants of noteimportant must not occur in the descendants of notenote must not occur in the descendants of notetip must not occur in the descendants of notewarning must not occur in the descendants of note

A suggestion to the user, set off from the textcaution must not occur in the descendants of tipimportant must not occur in the descendants of tipnote must not occur in the descendants of tiptip must not occur in the descendants of tipwarning must not occur in the descendants of tip

An admonition set off from the textcaution must not occur in the descendants of warningimportant must not occur in the descendants of warningnote must not occur in the descendants of warningtip must not occur in the descendants of warningwarning must not occur in the descendants of warning

Identifies the type of mark to be used on items in this listA list in which each entry is marked with a bullet or other dingbat

continuesSpecifies that numbering should begin where the preceding list left offrestartsSpecifies that numbering should begin again at 1Indicates how list numbering should begin relative to the immediately preceding listSpecifies the initial line number.ignoreSpecifies that numbering should ignore list nestinginheritSpecifies that numbering should inherit from outer-level listsIndicates whether or not item numbering should be influenced by list nestingarabicSpecifies Arabic numeration (1, 2, 3, …)upperalphaSpecifies upper-case alphabetic numeration (A, B, C, …)loweralphaSpecifies lower-case alphabetic numeration (a, b, c, …)upperromanSpecifies upper-case Roman numeration (I, II, III, …)lowerromanSpecifies lower-case Roman numeration (i, ii, iii …)Indicates the desired numerationA list in which each entry is marked with a sequentially incremented label

Specifies the keyword for the type of mark that should be used on this
item, instead of the mark that would be used by defaultA wrapper for the elements of a list item

A segmented list, a list of sets of elements

The title of an element of a list item in a segmented list

A list item in a segmented listThe number of seg elements must be the same as the number of segtitle elements in the parent segmentedlist

An element of a list item in a segmented list

horizA tabular presentation in row-major order.vertA tabular presentation in column-major order.inlineAn inline presentation, usually a comma-delimited list.Specifies the type of list presentation.Specifies the number of columns for horizontal or vertical presentationAn undecorated list of single words or short phrases

An element of a simple list

Indicates a length beyond which the presentation system may consider a term too long and select an alternate presentation for that term, item, or listA list in which each entry is composed of a set of one or more terms and an associated description

A wrapper for a set of terms and the associated description in a variable list

The word or phrase being defined or described in a variable list

A formal example, with a titleexample must not occur in the descendants of examplefigure must not occur in the descendants of exampletable must not occur in the descendants of exampleequation must not occur in the descendants of examplecaution must not occur in the descendants of exampleimportant must not occur in the descendants of examplenote must not occur in the descendants of exampletip must not occur in the descendants of examplewarning must not occur in the descendants of example

A displayed example without a title

A literal listing of all or part of a program

monospacedThe literal layout should be formatted with a monospaced fontnormalThe literal layout should be formatted with the current fontSpecifies the class of literal layoutA block of text in which line breaks and white space are to be reproduced faithfully

Text that a user sees or might see on a computer screen

A representation of what the user sees or might see on a computer screen

A formal figure, generally an illustration, with a titleexample must not occur in the descendants of figurefigure must not occur in the descendants of figuretable must not occur in the descendants of figureequation must not occur in the descendants of figurecaution must not occur in the descendants of figureimportant must not occur in the descendants of figurenote must not occur in the descendants of figuretip must not occur in the descendants of figurewarning must not occur in the descendants of figure

A untitled figure

A displayed media object (video, audio, image, etc.)

An inline media object (video, audio, image, and so on)

A wrapper for video data and its associated meta-information

A wrapper for audio data and its associated meta-information

A wrapper for image data and its associated meta-information

A wrapper for a text description of an object and its associated meta-information

Specifies the (horizontal) alignment of the video dataSpecifies the vertical alignment of the video dataDetermines if anamorphic scaling is forbiddenPointer to external video data

Pointer to external audio data

Specifies the (horizontal) alignment of the image dataSpecifies the vertical alignment of the image dataDetermines if anamorphic scaling is forbiddenPointer to external image data

Identifies the encoding of the text in the external filePointer to external text data

A captionexample must not occur in the descendants of captionfigure must not occur in the descendants of captiontable must not occur in the descendants of captionequation must not occur in the descendants of captioncaution must not occur in the descendants of captionimportant must not occur in the descendants of captionnote must not occur in the descendants of captiontip must not occur in the descendants of captionwarning must not occur in the descendants of captionsidebar must not occur in the descendants of captiontask must not occur in the descendants of caption

A general-purpose element for representing the syntax of commands or functions

Specifies the character that should separate the command and its top-level argumentsIndicates the displayed length of the command; this information may be used to intelligently indent command synopses which extend beyond one lineA syntax summary for a software command

norepeatCan not be repeated.repeatCan be repeated.Indicates whether or not repetition is possible.optFormatted to indicate that it is optional.plainFormatted without indication.reqFormatted to indicate that it is required.Indicates optionality.Indicates optionality.

An argument in a CmdSynopsis

A group of elements in a CmdSynopsis

An explicit line break in a command synopsis

A portion of a CmdSynopsis broken out from the main body of the synopsis

A reference to a fragment of a command synopsis@linkend on synopfragmentref must point to a synopfragment.

The syntax summary for a function definition

Information supplementing the FuncDefs of a FuncSynopsis

The prototype of a function

A function (subroutine) name and its return type

An empty element in a function synopsis indicating that the function in question takes no arguments

An empty element in a function synopsis indicating a variable number of arguments

optFormatted to indicate that it is optional.reqFormatted to indicate that it is required.Indicates optionality.Information about a function parameter in a programming language

Parameters for a function referenced through a function pointer in a synopsis

classThis is the synopsis of a classinterfaceThis is the synopsis of an interfaceSpecifies the nature of the synopsisThe syntax summary for a class definition

Information supplementing the contents of a ClassSynopsis

A class in an object-oriented programming language

An interface in an object-oriented programming language

An exception in an object-oriented programming language

Can be used to indicate that whitespace in the modifier should be preserved (for multi-line annotations, for example).preserveExtra whitespace and line breaks must be preserved.

Modifiers in a synopsis

The name of an interface

The name of an exception

The name of a field in a class definition

The initializer for a FieldSynopsis

A syntax summary for a constructor

A syntax summary for a destructor

A syntax summary for a method

The name of a method

Parameters to a method

A real-world address, generally a postal address

A street address in an address

A post office box in an address

A postal code in an address

The name of a city in an address

A state or province in an address

The name of a country

A telephone number

A fax number

Uncategorized information in address

The institutional affiliation of an individual

A brief description of an affiliation

The title of an individual in an organization

consortiumA consortiumcorporationA corporationinformalAn informal organizationnonprofitA non-profit organizationSpecifies the nature of the organizationSpecifies the nature of the organizationotherIndicates a non-standard organization classIdentifies the non-standard nature of the organizationThe name of an organization other than a corporation

A division of an organization

The page numbers of an article as published

The personal name of an individual

The name of an individual author

Wrapper for author information when a document has multiple authors or collabarators

Identifies a collaborator

The initials or other short identifier for an author

A person and associated metadata

An organization and associated metadata

A wrapper for document meta-information about a conference

The dates of a conference for which a document was written

The title of a conference for which a document was written

An identifier, frequently numerical, associated with a conference for which a document was written

The sponsor of a conference for which a document was written

The contract number of a document

The sponsor of a contract

Copyright information about a document

The year of publication of a document

The name of the individual or organization that holds a copyright

Additional content for the cover of a publication

The date of publication or revision of a document

The name or number of an edition of a document

The name of the editor of a document

An identifier for a document

A citation of a bibliographic identifier

The source of a document

hasformatThe described resource pre-existed the referenced resource, which is essentially the same intellectual content presented in another formathaspartThe described resource includes the referenced resource either physically or logicallyhasversionThe described resource has a version, edition, or adaptation, namely, the referenced resourceisformatofThe described resource is the same intellectual content of the referenced resource, but presented in another formatispartofThe described resource is a physical or logical part of the referenced resourceisreferencedbyThe described resource is referenced, cited, or otherwise pointed to by the referenced resourceisreplacedbyThe described resource is supplanted, displaced, or superceded by the referenced resourceisrequiredbyThe described resource is required by the referenced resource, either physically or logicallyisversionofThe described resource is a version, edition, or adaptation of the referenced resource; changes in version imply substantive changes in content rather than differences in formatreferencesThe described resource references, cites, or otherwise points to the referenced resourcereplacesThe described resource supplants, displaces, or supersedes the referenced resourcerequiresThe described resource requires the referenced resource to support its function, delivery, or coherence of contentIdentifies the type of relationshipIdentifies the type of relationshipothertypeThe described resource has a non-standard relationship with the referenced resourceA keyword that identififes the type of the non-standard relationshipThe relationship of a document to another

dcmipointThe DCMI Point identifies a point in space using its geographic coordinatesiso3166ISO 3166 Codes for the representation of names of countriesdcmiboxThe DCMI Box identifies a region of space using its geographic limitstgnThe Getty Thesaurus of Geographic NamesSpecifies the type of spatial coverageSpecifies the type of spatial coverageotherspatialIdentifies a non-standard type of coverageA keyword that identifies the type of non-standard coveragedcmiperiodA specification of the limits of a time intervalw3c-dtfW3C Encoding rules for dates and times—a profile based on ISO 8601Specifies the type of temporal coverageSpecifies the type of temporal coverageothertemporalSpecifies a non-standard type of coverageA keyword that identifies the type of non-standard coverageThe spatial or temporal coverage of a document

A statement of legal obligations or requirements

copyeditorA copy editorgraphicdesignerA graphic designerotherSome other contributorproductioneditorA production editortechnicaleditorA technical editortranslatorA translatorIdentifies the nature of the contributorIdentifies the nature of the non-standard contributionIdentifies the nature of the contributorotherIdentifies a non-standard contributionA person or entity, other than an author or editor, credited in a document

The numbers of the pages in a book, for use in a bibliographic entry

A summary of the contributions made to a document by a credited source

The title of a person

The first name of a person

A family name; in western cultures the last name

The portion of a person's name indicating a relationship to ancestors

A component of a persons name that is not a first name, surname, or lineage

The printing history of a document

copyrightA name with a copyrightregisteredA name with a registered copyrightserviceA name of a servicetradeA name which is trademarkedSpecifies the class of product nameThe formal name of a product

A number assigned to a product

The date of publication of a document

The publisher of a document

The name of the publisher of a document

Information about a particular release of a document

A history of the revisions to a document

An entry describing a single revision in the history of the revisions to a document

A document revision number

A description of a revision to a document

A extended description of a revision to a document

Numbers of the volumes in a series of books

The volume number of a document in a set (as of books in a set or articles in a journal)

The number of an issue of a journal

A graphical user interface (GUI) keyboard shortcut

hardwareA hardware applicationsoftwareA software applicationIdentifies the class of applicationThe name of a software program

devicefileA devicedirectoryA directoryextensionA filename extensionheaderfileA header file (as for a programming language)libraryfileA library filepartitionA partition (as of a hard disk)symlinkA symbolic linkIdentifies the class of filenameSpecifies the path of the filenameThe name of a file

clickA (single) mouse click.double-clickA double mouse click.pressA mouse or key press.seqSequential clicks or presses.simulSimultaneous clicks or presses.Identifies the nature of the action taken. If keycombo
contains more than one element, simul
is the default, otherwise there is no default.Identifies the nature of the action takenotherIndicates a non-standard actionIdentifies the non-standard action in some unspecified way.A combination of input actions

Identifies the class of constantlimitThe value is a limit of some kindA programming or system constant

The name of a variable

A string of formatting markup in text that is to be represented literally

A selection or series of selections from a menu

A key combination for an action that is also accessible through a menu

The conventional name of a mouse button

An option for a software command

Optional information

A unit of data associated with some part of a computer system

commandA commandfunctionA functionoptionAn optionIdentifies the class of parameterA value or a symbolic reference to a value

A character or string indicating the start of an input field in a computer display

commandA commandfunctionA functionoptionAn optionparameterA parameterIdentifies the nature of the replaceable textContent that may or must be replaced by the user

The value returned by a function

attributeAn attributeattvalueAn attribute valueelementAn elementemptytagAn empty element tagendtagAn end taggenentityA general entitylocalnameThe local name part of a qualified namenamespaceA namespacenumcharrefA numeric character referenceparamentityA parameter entitypiA processing instructionprefixThe prefix part of a qualified namecommentAn SGML commentstarttagA start tagxmlpiAn XML processing instructionIdentifies the nature of the tag contentIdentifies the namespace of the tag contentA component of XML (or SGML) markup

Identifies the class of symbollimitThe value is a limit of some kindA name that is replaced by a value before processing

daemonA daemon or other system process (syslogd)domainnameA domain name (example.com)etheraddressAn ethernet address (00:05:4E:49:FD:8E)eventAn event of some sort (SIGHUP)eventhandlerAn event handler of some sort (hangup)filesystemA filesystem (ext3)fqdomainnameA fully qualified domain name (my.example.com)groupnameA group name (wheel)ipaddressAn IP address (127.0.0.1)libraryA library (libncurses)macroA macronetmaskA netmask (255.255.255.192)newsgroupA newsgroup (comp.text.xml)osnameAn operating system name (Hurd)processA process (gnome-cups-icon)protocolA protocol (ftp)resourceA resourceserverA server (mail.example.com)serviceA service (ppp)systemnameA system name (hephaistos)usernameA user name (ndw)Identifies the nature of the system itemA system-related item or term

Identifies the type of URI specifiedA Uniform Resource Identifier

A unit of information

The classification of a value

Data entered by the user

An abbreviation, especially one followed by a period

An often pronounceable word made from the initial (or selected) letters of a name or phrase

An inline bibliographic reference to another published work

A citation to a reference page

The title of a reference page

A reference volume number

articleAn articlebbsA bulletin board systembookA bookcdromA CD-ROMchapterA chapter (as of a book)dvdA DVDemailmessageAn email messagegopherA gopher pagejournalA journalmanuscriptA manuscriptnewspostingA posting to a newsgrouppartA part (as of a book)refentryA reference entrysectionA section (as of a book or article)seriesA seriessetA set (as of books)webpageA web pagewikiA wiki pageIdentifies the nature of the publication being citedThe title of a cited work

Emphasized text

A limited span of emphasized text

A word or phrase in a language other than the primary language of the document

A span of text

A limited span of text

An inline quotation

A subscript (as in H2
O, the molecular formula for water)

A superscript (as in x^2, the mathematical notation for x multiplied by itself)

A word meant specifically as a word and not representing anything else

A cross reference to a footnote (a footnote mark)@linkend on footnoteref must point to a footnote.

A cross reference to another part of the document

A hypertext link

Holds additional information that may be used by the applicatoin when resolving the linkSpecifies the URI of the document in which the link target appearsSpecifies the location of the link target in the documentIdentifies application-specific customization of the link behaviorA link that addresses its target indirectly

A spot in the document

A text-only annotation, often used for accessibility

Identifies one or more annotations that apply to this element

Identifies one ore more elements to which this annotation appliesAn annotationannotation must not occur in the descendants of annotation

Specifies the XLink traversal-fromSpecifies the XLink labelSpecifies the XLink traversal-to

Identifies the editorial or publication status of the element on which it occurs

A collection of booksThe root element must have a version attribute.

A bookThe root element must have a version attribute.

The dedication of a book or other componentThe root element must have a version attribute.

Acknowledgements of a book or other componentThe root element must have a version attribute.

Text at the back of a book describing facts about its productionThe root element must have a version attribute.

An appendix in a Book or ArticleThe root element must have a version attribute.

A chapter, as of a bookThe root element must have a version attribute.

A division in a bookThe root element must have a version attribute.

Introductory matter preceding the first chapter of a bookThe root element must have a version attribute.

An introduction to the contents of a part

A recursive sectionThe root element must have a version attribute.

A section of a document with no subdivisions

faqA collection of frequently asked questions.journalarticleAn article in a journal or other periodical.productsheetA description of a product.specificationA specification.techreportA technical report.whitepaperA white paper.Identifies the nature of the articleAn articleThe root element must have a version attribute.

A top-level section of documentThe root element must have a version attribute.

A subsection within a Sect1The root element must have a version attribute.

A subsection within a Sect2The root element must have a version attribute.

A subsection within a Sect3The root element must have a version attribute.

A subsection within a Sect4The root element must have a version attribute.

A collection of reference entriesThe root element must have a version attribute.

A reference page (originally a UNIX man-style reference page)The root element must have a version attribute.

Meta-information for a reference entry

sourceThe name of the software product or component to which this topic appliesversionThe version of the software product or component to which this topic appliesmanualThe section title of the reference page (e.g., User Commands)sectdescThe section title of the reference page (believed synonymous with "manual" but in wide use)softwareThe name of the software product or component to which this topic applies (e.g., SunOS x.y; believed synonymous with "source" but in wide use)Identifies the kind of miscellaneous informationIdentifies the nature of non-standard miscellaneous informationIdentifies the kind of miscellaneious informationotherIndicates that the information is some 'other' kind.

Meta-information for a reference entry other than the title and volume number

The name, purpose, and classification of a reference page

A description of the topic of a reference page

The name of (one of) the subject(s) of a reference page

A short (one sentence) synopsis of the topic of a reference page

The scope or other indication of applicability of a reference entry

A syntactic synopsis of the subject of the reference page

A recursive section in a refentryThe root element must have a version attribute.

A major subsection of a reference entryThe root element must have a version attribute.

A subsection of a refsect1The root element must have a version attribute.

A subsection of a refsect2The root element must have a version attribute.

Specifies the base form of the term, the one that appears in the glossary. This allows adjectival, plural, and other variations of the term to appear in the element. The element content is the default base form.

A wrapper for a list of glossary entries

Specifies the string by which the element's content is to be sorted; if unspecified, the content is usedAn entry in a Glossary or GlossList

Specifies a list of keywords for the definitionA definition in a GlossEntry

Identifies the other termA cross-reference from one glossentry
to another@otherterm on glosssee must point to a glossentry.

Identifies the other termA cross-reference from one GlossEntry to another@otherterm on glossseealso must point to a glossentry.

The first occurrence of a term@linkend on firstterm must point to a glossentry.

A glossary term@linkend on glossterm must point to a glossentry.

A glossaryThe root element must have a version attribute.

A division in a Glossary

An inline definition of a termA termdef must contain exactly one firstterm

Identifies the relationship between the bibliographic elemnts

An entry in a Bibliography

An entry in a Bibliography

A raw container for related bibliographic information

A cooked container for related bibliographic information

Untyped bibliographic information

A bibliographyThe root element must have a version attribute.

A section of a Bibliography

A wrapper for a list of bibliography entries

The units (for example, pages) used to identify the beginning and ending of a reference.Identifies the beginning of a reference; the location within the work that is being referenced.Identifies the end of a reference.A cross-reference to a bibliographic entry

normalNormalpreferredPreferredSpecifies the significance of the termSpecifies the IDs of the elements to which this term appliesIndicates the page on which this index term occurs in some version of the printed documentallAll indexesglobalThe global index (as for a combined index of a set of box)localThe local index (the index for this document only)Specifies the scope of the index termSpecifies the string by which the term is to be sorted; if unspecified, the term content is usedSpecifies the target index for this term

A set of index terms in the meta-information of a document

Identifies the class of index termsingularA singular index termA wrapper for an indexed term

Identifies the class of index termstartofrangeThe start of a rangeA wrapper for an indexed term that covers a range

Identifies the class of index termendofrangeThe end of a rangePoints to the start of the rangeIdentifies the end of a range associated with an indexed term

The primary word or phrase under which an index term should be sorted

A secondary word or phrase in an index term

A tertiary word or phrase in an index term

Part of an index term directing the reader instead to another entry in the index

Part of an index term directing the reader also to another entry in the index

An index to a book or part of a bookThe root element must have a version attribute.

An index to a set of booksThe root element must have a version attribute.

A division in an index

An entry in an index

A primary term in an index entry, not in the text

A secondary term in an index entry, rather than in the text

A tertiary term in an index entry, rather than in the text

A See
entry in an index, rather than in the text

A See also
entry in an index, rather than in the text

Indicates the page on which this element occurs in some version of the printed document

A table of contentsThe root element must have a version attribute.

A division in a table of contents

A component title in a table of contents

A task to be completed

A summary of a task

The prerequisites for a task

Information related to a task

calspairCoordinates expressed as a pair of CALS graphic coordinates.linecolumnCoordinates expressed as a line and column.linecolumnpairCoordinates expressed as a pair of lines and columns.linerangeCoordinates expressed as a line range.Identifies the units used in the coords attribute The default units vary according to the type of callout specified: calspair
for graphics and linecolumn
for line-oriented elements.Indicates that non-standard units are used for this area
. In this case otherunits
must be specified.otherCoordinates expressed in some non-standard units.Identifies the units used in the coords
attribute when the units
attribute is other
. This attribute is forbidden otherwise.

A list of callout
s

Identifies the areas described by this callout.A called out
description of a marked Area

A program listing with associated areas used in callouts

A collection of regions in a graphic or code example

Point to the callout
s which refer to this area. (This provides bidirectional linking which may be useful in online presentation.)Specifies an identifying number or string that may be used in presentation. The area label might be drawn on top of the figure, for example, at the position indicated by the coords attribute.Provides the coordinates of the area. The coordinates must be interpreted using the units
specified.A region defined for a Callout in a graphic or code example

A region defined for a Callout in a graphic or code example

A set of related areas in a graphic or code example

A screen with associated areas used in callouts

A wrapper for an image object with callouts

The location of a callout embedded in text

A cross reference to a co

A set of EBNF productions

A production in a set of EBNF productions

The left-hand side of an EBNF production

The right-hand side of an EBNF production

Specifies a URI that points to a production
where the nonterminal
is definedA non-terminal in an EBNF production

A constraint in an EBNF production

A cross-reference to an EBNF production

The definition of a constraint in an EBNF production

Specifies the alignment character when align
is set to char
.Specifies the percentage of the column's total width that should appear to the left of the first occurance of the character identified in char
when align
is set to char
.
0
100
Specifies how the table is to be framed. Note that there is no way to obtain a border on only the starting edge (left, in left-to-right writing systems) of the table.allFrame all four sides of the table. In some environments with limited control over table border formatting, such as HTML, this may imply additional borders.bottomFrame only the bottom of the table.nonePlace no border on the table. In some environments with limited control over table border formatting, such as HTML, this may disable other borders as well.sidesFrame the left and right sides of the table.topFrame the top of the table.topbotFrame the top and bottom of the table.Specifies the presence or absence of the column separator0No column separator rule.1Provide a column separator rule on the rightSpecifies the presence or absence of the row separator0No row separator rule.1Provide a row separator rule belowSpecifies the orientation of the tableland90 degrees counter-clockwise from the rest of the text flow.portThe same orientation as the rest of the text flow.Specifies the table styleIndicates whether or not the entries in the first column should be considered row headersfirstcolIndicates that entries in the first column of the table are functionally row headers (analogous to the way that a thead provides column headers).norowheaderIndicates that entries in the first column have no special significance with respect to column headers.Specifies the horizontal alignment of text in an entry.centerCentered.charAligned on a particular character.justifyLeft and right justified.leftLeft justified.rightRight justified.Specifies the vertical alignment of text in an entry.bottomAligned on the bottom of the entry.middleAligned in the middle.topAligned at the top of the entry.Specifies a column specification by name.Specifies a starting column by name.Specifies a span by name.Specifies a starting column by name.Specifies an ending column by name.Provides a name for a column specification.Provides a name for a span specification.

Additional style information for downstream processing; typically the name of a style.The number of columns in the table. Must be an integer greater than zero.A wrapper for the main content of a table, or part of a table

The number of the column to which this specification applies. Must be greater than any preceding column number. Defaults to one more than the number of the preceding column, if there is one, or one.Specifies the width of the column.Specifications for a column in a table

Specifies a starting column by name.Specifies an ending column by name.Formatting information for a spanned column in a table

A table header consisting of one or more rows

A table footer consisting of one or more rows

A wrapper for the rows of a table or informal table

A row in a table

Specifies the number of additional rows which this entry occupies. Defaults to zero.Specifies the rotation of this entry. A value of 1 (true) rotates the cell 90 degrees counter-clockwise. A value of 0 (false) leaves the cell unrotated.0Do not rotate the cell.1Rotate the cell 90 degrees counter-clockwise.A cell in a table

Additional style information for downstream processing; typically the name of a style.The number of columns in the entry table. Must be an integer greater than zero.A subtable appearing in place of an Entry in a table

A table header consisting of one or more rows

A wrapper for the rows of a table or informal table

A row in a table

Indicates if the short or long title should be used in a List of Tables0Indicates that the full title should be used.1Indicates that the short short title (titleabbrev) should be used.Indicates if the table should appear in a List of Tables0Indicates that the table should not occur in the List of Tables.1Indicates that the table should appear in the List of Tables.A formal table in a documentexample must not occur in the descendants of tablefigure must not occur in the descendants of tableequation must not occur in the descendants of tablecaution must not occur in the descendants of tableimportant must not occur in the descendants of tablenote must not occur in the descendants of tabletip must not occur in the descendants of tablewarning must not occur in the descendants of tableinformaltable must not occur in the descendants of table

A table without a title

This attribute assigns a class name or set of class names to an element. Any number of elements may be assigned the same class name or names. Multiple class names must be separated by white space characters.This attribute specifies style information for the current element.This attribute offers advisory information about the element for which it is set.This attribute specifies the base language of an element's attribute values and text content. The default value of this attribute is unknown.Occurs when the pointing device button is clicked over an element.Occurs when the pointing device button is double clicked over an element.Occurs when the pointing device button is pressed over an element.Occurs when the pointing device button is released over an element.Occurs when the pointing device is moved onto an element.Occurs when the pointing device is moved while it is over an element.Occurs when the pointing device is moved away from an element.Occurs when a key is pressed and released over an element.Occurs when a key is pressed down over an element.Occurs when a key is released over an element.Specifies the alignment of data and the justification of text in a cell.leftLeft-flush data/Left-justify text. This is the default value for table data.centerCenter data/Center-justify text. This is the default value for table headers.rightRight-flush data/Right-justify text.justifyDouble-justify text.charAlign text around a specific character. If a user agent doesn't support character alignment, behavior in the presence of this value is unspecified.This attribute specifies a single character within a text fragment to act as an axis for alignment. The default value for this attribute is the decimal point character for the current language as set by the lang attribute (e.g., the period in English and the comma in French). User agents are not required to support this attribute.When present, this attribute specifies the offset to the first occurrence of the alignment character on each line. If a line doesn't include the alignment character, it should be horizontally shifted to end at the alignment position. When charoff is used to set the offset of an alignment character, the direction of offset is determined by the current text direction (set by the dir attribute). In left-to-right texts (the default), offset is from the left margin. In right-to-left texts, offset is from the right margin. User agents are not required to support this attribute.
[0-9]+%
Specifies the vertical position of data within a cell.topCell data is flush with the top of the cell.middleCell data is centered vertically within the cell. This is the default value.bottomCell data is flush with the bottom of the cell.baselineAll cells in the same row as a cell whose valign attribute has this value should have their textual data positioned so that the first text line occurs on a baseline common to all cells in the row. This constraint does not apply to subsequent text lines in these cells.Provides a summary of the table's purpose and structure for user agents rendering to non-visual media such as speech and Braille.Specifies the desired width of the entire table and is intended for visual user agents. When the value is a percentage value, the value is relative to the user agent's available horizontal space. In the absence of any width specification, table width is determined by the user agent.
[0-9]+%
Specifies the width (in pixels only) of the frame around a table.Specifies which sides of the frame surrounding a table will be visible.voidNo sides. This is the default value.aboveThe top side only.belowThe bottom side only.hsidesThe top and bottom sides only.lhsThe left-hand side only.rhsThe right-hand side only.vsidesThe right and left sides only.boxAll four sides.borderAll four sides.Specifies which rules will appear between cells within a table. The rendering of rules is user agent dependent.noneNo rules. This is the default value.groupsRules will appear between row groups (see thead, tfoot, and tbody) and column groups (see colgroup and col) only.rowsRules will appear between rows only.colsRules will appear between columns only.allRules will appear between all rows and columns.Specifies how much space the user agent should leave between the left side of the table and the left-hand side of the leftmost column, the top of the table and the top side of the topmost row, and so on for the right and bottom of the table. The attribute also specifies the amount of space to leave between cells.
[0-9]+%
Specifies the amount of space between the border of the cell and its contents. If the value of this attribute is a pixel length, all four margins should be this distance from the contents. If the value of the attribute is a percentage length, the top and bottom margins should be equally separated from the content based on a percentage of the available vertical space, and the left and right margins should be equally separated from the content based on a percentage of the available horizontal space.
[0-9]+%
Provides an abbreviated form of the cell's content and may be rendered by user agents when appropriate in place of the cell's content. Abbreviated names should be short since user agents may render them repeatedly. For instance, speech synthesizers may render the abbreviated headers relating to a particular cell before rendering that cell's content.This attribute may be used to place a cell into conceptual categories that can be considered to form axes in an n-dimensional space. User agents may give users access to these categories (e.g., the user may query the user agent for all cells that belong to certain categories, the user agent may present a table in the form of a table of contents, etc.). Please consult an HTML reference for more details.Specifies the list of header cells that provide header information for the current data cell. The value of this attribute is a space-separated list of cell names; those cells must be named by setting their id attribute. Authors generally use the headers attribute to help non-visual user agents render header information about data cells (e.g., header information is spoken prior to the cell data), but the attribute may also be used in conjunction with style sheets.Specifies the set of data cells for which the current header cell provides header information. This attribute may be used in place of the headers attribute, particularly for simple tables.rowThe current cell provides header information for the rest of the row that contains itcolThe current cell provides header information for the rest of the column that contains it.rowgroupThe header cell provides header information for the rest of the row group that contains it.colgroupThe header cell provides header information for the rest of the column group that contains it.Specifies the number of rows spanned by the current cell. The default value of this attribute is one (1
). The value zero (0
) means that the cell spans all rows from the current row to the last row of the table section (thead
, tbody
, or tfoot
) in which the cell is defined.Specifies the number of columns spanned by the current cell. The default value of this attribute is one (1
). The value zero (0
) means that the cell spans all columns from the current column to the last column of the column group (colgroup
) in which the cell is defined.

A formal (captioned) HTML table in a documentexample must not occur in the descendants of tablefigure must not occur in the descendants of tableequation must not occur in the descendants of tablecaution must not occur in the descendants of tableimportant must not occur in the descendants of tablenote must not occur in the descendants of tabletip must not occur in the descendants of tablewarning must not occur in the descendants of tableinformaltable must not occur in the descendants of table

An HTML table without a title

An HTML table captionexample must not occur in the descendants of captionfigure must not occur in the descendants of captiontable must not occur in the descendants of captionequation must not occur in the descendants of captioncaution must not occur in the descendants of captionimportant must not occur in the descendants of captionnote must not occur in the descendants of captiontip must not occur in the descendants of captionwarning must not occur in the descendants of captionsidebar must not occur in the descendants of captiontask must not occur in the descendants of caption

This attribute, whose value must be an integer > 0, specifies the number of columns spanned
by the col
element; the col
element shares its attributes with all the columns it spans. The default value for this attribute is 1 (i.e., a single column). If the span attribute is set to N > 1, the current col
element shares its attributes with the next N-1 columns.Specifies a default width for each column spanned by the current col
element. It has the same meaning as the width
attribute for the colgroup
element and overrides it.Specifications for a column in an HTML table

This attribute, which must be an integer > 0, specifies the number of columns in a column group. In the absence of a span attribute, each colgroup
defines a column group containing one column. If the span attribute is set to N > 0, the current colgroup
element defines a column group containing N columns. User agents must ignore this attribute if the colgroup
element contains one or more col
elements.This attribute specifies a default width for each column in the current column group. In addition to the standard pixel, percentage, and relative values, this attribute allows the special form 0*
(zero asterisk) which means that the width of the each column in the group should be the minimum width necessary to hold the column's contents. This implies that a column's entire contents must be known before its width may be correctly computed. Authors should be aware that specifying 0*
will prevent visual user agents from rendering a table incrementally. This attribute is overridden for any column in the column group whose width is specified via a col
element.A group of columns in an HTML table

A table header consisting of one or more rows in an HTML table

A table footer consisting of one or more rows in an HTML table

A wrapper for the rows of an HTML table or informal HTML table

A row in an HTML table

A table header entry in an HTML table

A table entry in an HTML table

A detailed set of messages, usually error messages

A wrapper for an entry in a message set

The audience to which the message relevantThe origin of the messageThe level of importance or severity of a messageA wrapper for a simpler entry in a message set

A displayed mathematical equationexample must not occur in the descendants of equationfigure must not occur in the descendants of equationtable must not occur in the descendants of equationequation must not occur in the descendants of equationcaution must not occur in the descendants of equationimportant must not occur in the descendants of equationnote must not occur in the descendants of equationtip must not occur in the descendants of equationwarning must not occur in the descendants of equation

A displayed mathematical equation without a title

A mathematical equation or expression occurring inline

A mathematical phrase, an expression that can be represented with ordinary text and a small amount of markup

Specifies that the format of the data is MathMLmathmlSpecifies MathML.A MathML expression in a media object

Any element from the MathML namespace

Specifies that the format of the data is SVGsvgSpecifies SVG.An SVG drawing in a media object

Any element from the SVG namespace

Container for global rules.Version of the ITS schema.Pointer to external rules files.Type of pointer to external rules files.simpleSimple link.XPath expression identifying the nodes to be selected.Version of the ITS schema.The Translate data category information to be attached to
the current node.yesThe nodes need to be translated.noThe nodes must not be translated.Localization note.The type of localization note.alertLocalization note is an alert.descriptionLocalization note is a description.URI referring to the location of the localization note.Pointer to a resource containing
information about the term.Indicates a term locally.yesThe value 'yes' means that this is a term.noThe value 'no' means that this is not a term.The text direction for the context.ltrLeft-to-right text.rtlRight-to-left text.lroLeft-to-right override.rloRight-to-left override.Inline element to contain ITS information.Rule about the Translate data category.The Translate data category information to be
applied to selected nodes.yesThe nodes need to be translated.noThe nodes must not be translated.The Translate data category information to be attached to
the current node.yesThe nodes need to be translated.noThe nodes must not be translated.Rule about the Localization Note data category.Relative XPath expression pointing to a node that holds the localization note.The type of localization note.alertLocalization note is an alert.descriptionLocalization note is a description.URI referring to the location of the localization note.Relative XPath expression pointing to a node that holds the URI referring to the location of the localization note.Contains a localization note.Localization note.The type of localization note.alertLocalization note is an alert.descriptionLocalization note is a description.URI referring to the location of the localization note.Rule about the Terminology data category.Indicates whether the selection is a term or not.yesThe value 'yes' means that this is a term.noThe value 'no' means that this is not a term.URI referring to the resource providing information about the term.Relative XPath expression pointing to a node containing a URI referring to the resource providing information about the term.Relative XPath expression pointing to a node containing
information about the term.Pointer to a resource containing
information about the term.Indicates a term locally.yesThe value 'yes' means that this is a term.noThe value 'no' means that this is not a term.Rule about the Directionality data category.The text direction for the selection.ltrLeft-to-right text.rtlRight-to-left text.lroLeft-to-right override.rloRight-to-left override.Rule about the Ruby data category.Relative XPath expression pointing to a node that corresponds to a ruby elementRelative XPath expression pointing to a node that
corresponds to a rt elementRelative XPath expression pointing to a node that
corresponds to a rp elementRelative XPath expression pointing to a node that
corresponds to a rbc elementRelative XPath expression pointing to a node that
corresponds to a rtc elementRelative XPath expression pointing to a node that corresponds to a rbspan attribute.Ruby text.Allows an rt element to span multiple rb elements in complex ruby markup.Ruby markup.Ruby base text.Ruby text.Allows an rt element to span multiple rb elements in complex ruby markup.Container for rb elements in the case of complex ruby markup.Container for rt elements in the case of complex ruby markup. Used in the case of simple ruby markup to specify characters that can denote the beginning and end of ruby text when user agents do not have other ways to present ruby text distinctively from the base text.Rule about the Language Information data category.Relative XPath expression pointing to a node that contains language information.Rule about the Elements Within Text data category.States whether current context is regarded as
"within text".yesThe element and its content are part of the flow of its parent element.noThe element splits the text flow of its parent element and its content is an independent text flow.nestedThe element is part of the flow of its parent element, its content is an independent flow.